Matching between matrix elements and parton showers using a Leading-Log subtraction method in NLO-QCD

Abstract

A new method to construct event-generators based on next-to-leading order QCD matrix-elements and leading-logarithmic parton showers is proposed. Matrix elements of loop diagrams as well as those of a tree level can be generated using an automatic system. A soft/collinear singularity is treated using a leading-log subtraction method. Higher order re-summation of the soft/collinear correction by the parton shower method is combined with the NLO matrix-element without any double-counting in this method.

10 pages, 3 gifures, CPP2001, Nov. 2001, Tokyo, Japan